<template>
  <div class="collapse-item">
    <div class="title" @click="toggle" :data-name="name">
      {{title}}
    </div>
    <div class="content" ref="content" v-if="open">
      <slot></slot>
    </div>
  </div>
</template>

<script>
  export default {
    name: 'GuLuCollapseItem',
    props: {
      title: {
        type: String,
        required: true
      },
      name: {
        type: String,
        required: true
      }
    },
    data() {
      return {
        open: false,
      }
    },
    inject: ['eventBus'],
    mounted() {
      this.eventBus && this.eventBus.$on('update:selected', (names) => {
        this.open = names.indexOf(this.name) >= 0;
      })

    },
    methods: {
      toggle() {
        if (this.open) {
          this.eventBus && this.eventBus.$emit('update:removeSelected', this.name)
        } else {
          this.eventBus && this.eventBus.$emit('update:addSelected', this.name)
        }
      },
    }
  }
</script>

<style lang="scss" scoped>
  $grey: #ddd;
  $border-radius: 4px;
  .collapse-item {
    > .title {border: 1px solid $grey;margin-top: -1px;margin-left: -1px;margin-right: -1px;
      min-height: 32px;display: flex;align-items: center;padding: 0 8px;}

    &:first-child {
      > .title {border-top-left-radius: $border-radius;border-top-right-radius: $border-radius;}
    }

    &:last-child {
      > .title:last-child {border-bottom-left-radius: $border-radius;border-bottom-right-radius: $border-radius;margin-bottom: -1px;}
    }

    > .content {padding: 8px;}
  }
</style>